That doesn’t paint much of a picture, but, honestly, you just have to experience the annual earth art celebration yourself to “get” it. Even then, you might walk away thinking, “What did I just see?”

The fourth annual Llano Earth Art Festival returns to Grenwelge Park, 199 E. Haynie St., on Friday-Monday, March 9-12. Tickets are $10 in advance through the LEAF website at llanoearthartfest.org and $15 at the gate. Ages 15 and younger get in free when accompanied by a parent.

When Marcus Hammons moved to Llano in 2013 from the Texas Gulf Coast, there wasn’t anyone making rock sculptures, something he picked up in 2005 or 2006 from a couple of Norwegian visitors. He spied them “stacking rocks” on one of the jetties and became enamored with the art form.

Soon, he was creating his own rock sculptures around the jetties. When he and his wife, Valeria Smasal, moved to Llano in 2013, he discovered the mother lode of rocks.

“Nobody was doing it here when I moved here,” Hammons said.

He would create sculptures around town, even including it in his landscaping designs. The sculptures caught the attention of Morgan, who then tossed the idea of holding a rock-stacking festival, which eventually became an art festival.

And if you’re going to have a rock-stacking festival, why not also host the national rock-stacking championship, Houston said.

Almost right out of the gate, LEAF became known as the home of the national rock stacking championship. It added the world championship last year.

Hammons, who doesn’t compete in the championship but does sculpt during LEAF, pointed out a couple of things that really gave LEAF a boost the first year: the great weather and quick buy-in by earth artists such as Michael Grab of Boulder, Colorado, who jumped on board and spread the word.

“We weren’t expecting that many people the first year, but the buzz got bigger and bigger,” Hammons said. “We were thinking maybe 400 to 500 people (in 2015), but then we had 1,500 to 2,000.”

“We kind of had no idea,” Houston said about the LEAF committee’s expectation for attendance the first year. “I remember showing up the first day and was blown away by how many people were there.”

LEAF draws many people from the Highland Lakes, but others from outside the area have discovered this off-kilter, not-your-typical-Hill-Country festival. Last year, even with some rain, it drew between 5,000 and 6,000 people.

The event brings in national and international artists. Hammons said they expect artists from the United Kingdom, Canada, Italy, France, and even Slovenia.

One of the great things about LEAF is it’s a participatory event. If you’re sitting along the Llano River at Grenwelge Park, you might feel the urge to give rock stacking a try. Unless you’re entered in one of the contests, there’s no fee for getting your hands dirty.

The festival features different earth art forms as varied as the artists themselves. Plus, there’s a lineup of musicians, including Wood and Wire, Golden Dawn Arkestra with Joe King Carrasco, the Cadillac Gypsies, and Vocal Trash.

You can also enjoy the Free Flow on the Llano Vintage VW Car Show on Saturday and Sunday.

But one of the most interesting events is the Leafling Festie Fashion Circus Parade at 5:30 p.m. Saturday. It showcases the most “outrageous” attire worn by festival-goers.

The parade is another part of LEAF that’s best experienced — a description doesn’t do it justice.

Well, let’s face it, the only way to really understand LEAF is to check it out.

“That’s what I tell people,” Houston said. “I still have people in Llano who ask me what it is, and you just have to see it to really understand it.”